fix(otel): use NewSchemaless to avoid semconv schema URL conflicts

internal/o11y/otel/otel.go

@@ -101,10 +101,7 @@ func attributesFrom(cfg *config.Config) []attribute.KeyValue {
 func newResource(attributes []attribute.KeyValue) (*resource.Resource, error) {
 	return resource.Merge(
 		resource.Default(),
-		resource.NewWithAttributes(
-			semconv.SchemaURL,
-			attributes...,
-		),
+		resource.NewSchemaless(attributes...),
 	)
 }
 

internal/o11y/otel/otel_test.go

@@ -9,7 +9,7 @@ import (
 )
 
 func TestSetup(t *testing.T) {
-	// Assert that version for semconv schemas don't conflict with the current otel version.
+	// Assert that resource merge doesn't fail due to semconv schema conflicts.
 	_, err := otel.Setup(t.Context(), &config.Config{})
 	assert.NoError(t, err)
 }